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Computational and Experimental Mechanics of Thin-Walled Structures
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Computational and Experimental Mechanics of Thin-Walled Structures

A special issue of Materials (ISSN 1996-1944). This special issue belongs to the section "Mechanics of Materials".

Deadline for manuscript submissions: closed (10 March 2023) | Viewed by 7155

Special Issue Editors

Dr. Katarzyna Falkowicz

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Guest Editor
Department of Machine Design and Mechatronics, Faculty of Mechanical Engineering, Lublin University of Technology, 36 Nadbystrzycka St., 20-618 Lublin, Poland
Interests: computational mechanics; stability; plate elements; composites; matrix couplings; FEM; thin-walled structures; linear and nonlinear analysis
Special Issues, Collections and Topics in MDPI journals
Dr. Patryk Rozylo

E-Mail Website
Guest Editor
Faculty of Mechanical Engineering, Lublin University of Technology, Nadbystrzycka 36, 20-618 Lublin, Poland
Interests: buckling; post-buckling; failure; laminates; finite element method; numerical simulations; computational mechanics; thin-walled structures
Special Issues, Collections and Topics in MDPI journals
Dr. Pawel Wysmulski

E-Mail Website
Guest Editor
Department of Machine Design and Mechatronics, Faculty of Mechanical Engineering, Lublin University of Technology, 36 Nadbystrzycka St., 20-618 Lublin, Poland
Interests: thin-walled structures; laminates; buckling; critical state; finite element method; computational mechanics
Special Issues, Collections and Topics in MDPI journals

Special Issue Information

Dear Colleagues,

The wide range of thin-walled structures and composite materials applications in different areas of science and engineering motivates our interest to understand the governing mechanics, and to develop accurate and efficient computational models.

The field of computational mechanics of thin-walled structures has undergone intense development over the last several decades; nevertheless, is still in a phase of progression. Thanks to advances in numerical methods, which are powerful tools for engineering practice and materials design, solving materials problems and structure behavior is much easier, enabling the reliable assessment of phenomena connected with this topic. The scope of this Special Issue covers analyses of phenomena taking place in materials and structures subjected to different load states, especially limit states.

This Special Issue will address the above-mentioned research areas concerning the computational and experimental mechanics of thin-walled structures applied in engineering.

Dr. Katarzyna Falkowicz
Dr. Patryk Rozylo
Dr. Pawel Wysmulski
Guest Editors

Manuscript Submission Information

Manuscripts should be submitted online at www.mdpi.com by registering and logging in to this website. Once you are registered, click here to go to the submission form. Manuscripts can be submitted until the deadline. All submissions that pass pre-check are peer-reviewed. Accepted papers will be published continuously in the journal (as soon as accepted) and will be listed together on the special issue website. Research articles, review articles as well as short communications are invited. For planned papers, a title and short abstract (about 100 words) can be sent to the Editorial Office for announcement on this website.

Submitted manuscripts should not have been published previously, nor be under consideration for publication elsewhere (except conference proceedings papers). All manuscripts are thoroughly refereed through a single-blind peer-review process. A guide for authors and other relevant information for submission of manuscripts is available on the Instructions for Authors page. Materials is an international peer-reviewed open access semimonthly journal published by MDPI.

Please visit the Instructions for Authors page before submitting a manuscript. The Article Processing Charge (APC) for publication in this open access journal is 2600 CHF (Swiss Francs). Submitted papers should be well formatted and use good English. Authors may use MDPI's English editing service prior to publication or during author revisions.

Keywords

  • computational mechanics
  • thin-walled structures
  • finite element method
  • composites
  • experimental studies
  • stability
  • linear and nonlinear analysis

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Published Papers (4 papers)

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Research

14 pages, 4036 KiB  
Article
Investigation of an Effective Anchoring Length of CFRP Tapes Used to Strengthen Steel Thin-Walled Beams with a Rectangular Cross-Section Subjected to Four-Point Bending
by Ilona Szewczak, Malgorzata Snela and Patryk Rozylo
Materials 2023, 16(7), 2907; https://doi.org/10.3390/ma16072907 - 6 Apr 2023
Cited by 2 | Viewed by 1078
Abstract
In order to design an optimal reinforcement of steel thin-walled beams with composite materials, it is worth analyzing two important, although often overlooked issues, which are the selection of the appropriate thickness of the adhesive layer and the effective anchoring length of the [...] Read more.
In order to design an optimal reinforcement of steel thin-walled beams with composite materials, it is worth analyzing two important, although often overlooked issues, which are the selection of the appropriate thickness of the adhesive layer and the effective anchoring length of the composite tape. This paper, which is part of a wider laboratory study devoted to the strengthening of thin-walled steel profiles, focuses on the second issue. The paper involves a description of laboratory four-point bending tests during which ten thin-walled steel beams made of a rectangular section with dimensions of 120 × 60 × 3 and a length of 3 m were tested. Two beams were taken as reference beams, and the other eight were reinforced using Sika CarboDur S512 carbon fiber composite tape, assuming four different effective anchorage lengths. The impact of the length of the anchoring of the composite tape on the value of the displacements and strains of the tested beams and on the value of the destructive load that caused tape detachment was analyzed. The following phase was numerical analyses carried out in the Abaqus program, which showed high consistency with the results of laboratory tests. In reference to the conducted tests, it was observed that the increase in the anchoring length of the composite tape has a slight impact on the change in the value of strains and displacements in the tested beams. Nevertheless, the increase in the effective anchorage length has a significant impact on the load value at which the composite tapes are detached from the surface of the steel thin-walled beam. Full article
(This article belongs to the Special Issue Computational and Experimental Mechanics of Thin-Walled Structures)
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22 pages, 9043 KiB  
Article
Sensitivity of Compressed Composite Channel Columns to Eccentric Loading
by Pawel Wysmulski, Hubert Debski and Katarzyna Falkowicz
Materials 2022, 15(19), 6938; https://doi.org/10.3390/ma15196938 - 6 Oct 2022
Cited by 24 | Viewed by 1861
Abstract
This study investigated short thin-walled channel columns made of carbon/epoxy laminate. Columns with two multi-ply composite layups [0/45/−45/90]s and [90/−45/45/0]s were tested, with each layup having eight plies symmetric to the midplane. The columns were subjected to compressive loads, including an [...] Read more.
This study investigated short thin-walled channel columns made of carbon/epoxy laminate. Columns with two multi-ply composite layups [0/45/−45/90]s and [90/−45/45/0]s were tested, with each layup having eight plies symmetric to the midplane. The columns were subjected to compressive loads, including an eccentric compressive load applied relative to the center of gravity of their cross-section. Simple support boundary conditions were applied to the ends of the columns. The scope of the study included analyzing the effect of load eccentricity on the buckling mode, bifurcation load (idealized structure), and critical load (structure with initial imperfections). The critical load for the actual structure was determined with the use of approximation methods, based on experimental postbuckling equilibrium paths. In parallel with the experiments, a numerical analysis was conducted using the finite element method and Abaqus® software (Dassault Systèmes, Vélizy-Villacoublay, France). The first stage of the numerical analysis consisted of solving an eigenproblem, in order to determine the mode of the loss of structural stability and to calculate the bifurcation loads for structures under axial and eccentric compression. The second stage of the numerical analysis involved examining the non-linear state of pre-deflected structures. Numerical postbuckling equilibrium paths were used to estimate the critical loads with an approximation method. The experimental results were used to validate the numerical models. This made it possible to determine the effect of compressive load eccentricity on the buckling mode and critical load of the tested structures. The results confirmed that compressive load eccentricity had a significant impact on the load-carrying capacity in the postbuckling range. This may potentially lead to premature damage to composite materials and, ultimately, to a reduced load-carrying capacity of structures. Full article
(This article belongs to the Special Issue Computational and Experimental Mechanics of Thin-Walled Structures)
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16 pages, 6525 KiB  
Article
Numerical Investigations of Perforated CFRP Z-Cross-Section Profiles, under Axial Compression
by Katarzyna Falkowicz
Materials 2022, 15(19), 6874; https://doi.org/10.3390/ma15196874 - 3 Oct 2022
Cited by 16 | Viewed by 1561
Abstract
Thin-walled elements, thanks to their good properties, are increasingly used in structural applications, especially in the aircraft and building industries. These kinds of structures are often perforated for reducing weight and to ease servicing and maintenance operations, e.g., in aircraft wing ribs. These [...] Read more.
Thin-walled elements, thanks to their good properties, are increasingly used in structural applications, especially in the aircraft and building industries. These kinds of structures are often perforated for reducing weight and to ease servicing and maintenance operations, e.g., in aircraft wing ribs. These perforations cause a redistribution of stresses in the element which may change the ultimate strength of the structure and their elastic stiffness. The buckling behaviour of structural members with perforations is significantly influenced by the size, location, shape and number of perforations. Therefore, it is necessary to investigate the influence of these kinds of cut-out parameters on thin-walled structure buckling and postbuckling behaviour. This study investigated numerically the buckling and postbuckling behaviour of thin-walled perforated composite profiles with a Z-cross-section subjected to compression load. Numerical calculations were performed using the finite element method in the ABAQUS® program. The study investigated the effect of localisation and geometric parameters of cut-outs on the buckling load, postbuckling equilibrium path and failure load. Moreover, the perforated profiles were compared with a profile without cut-outs, which were experimentally tested in previous research. Results showed that the perforated profiles with a Z-cross-section do not lose their stability in the post-critical range. What is more, a well-chosen arrangement of the holes may prevent the mechanical properties from deteriorating. Full article
(This article belongs to the Special Issue Computational and Experimental Mechanics of Thin-Walled Structures)
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21 pages, 11277 KiB  
Article
Numerical Simulation and Experimental Study on Energy Absorption of Foam-Filled Local Nanocrystallized Thin-Walled Tubes under Axial Crushing
by Wei Wang, Yajing Wang, Zhen Zhao, Zhenzhen Tong, Xinsheng Xu and Chee Wah Lim
Materials 2022, 15(16), 5556; https://doi.org/10.3390/ma15165556 - 12 Aug 2022
Cited by 10 | Viewed by 1848
Abstract
A crashworthiness design of foam-filled local nanocrystallized thin-walled tubes (FLNTs) is proposed by using foam-filled structures and ultrasonic impact surface treatment. The crashworthiness and deformation modes of FLNTs are studied using an experiment and numerical analysis. A finite element numerical model of FLNTs [...] Read more.
A crashworthiness design of foam-filled local nanocrystallized thin-walled tubes (FLNTs) is proposed by using foam-filled structures and ultrasonic impact surface treatment. The crashworthiness and deformation modes of FLNTs are studied using an experiment and numerical analysis. A finite element numerical model of FLNTs is established, and the processing and test platform of FLNTs is set up to verify the numerical predication and analytical design. The results show that local nanocrystallization is an effective method to enhance crashworthiness for hexagonal FLNTs. The FLNTs with four circumferential continuous stripes of surface nanocrystallization exhibit a level of 47.12% higher specific energy absorption than the untreated tubes in numerical simulations for tubes with a 50% ratio of nanocrystallized area. Inspired by the strength mechanism, a novel nested foam-filled local surface nanocrystallization tube is further designed and studied in detail. Full article
(This article belongs to the Special Issue Computational and Experimental Mechanics of Thin-Walled Structures)
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